​Which is which 

Is not at all like
This or that
The latter is an either
The former a choice
Of one or another
That can be chosen
By one as well as
The one can be you
As can he or she be
But typically stands in for me
Or you, but not you and me
As that is us, or we with to be
While I stands alone
Not lonely alone
But by oneself
For one can be amongst
And be lonely
But never alone among many
Unless
One states the obvious
Only to lose track
Over they turning to them
And get making us have
That which we cannot
Not to be confused
With the which of before
Which is a bit of a witch
For making us choose in the first place
When everyone knows
Either is rarely neither either